Commit Graph

153 Commits

Author SHA1 Message Date
thorpej cf013daeb3 Fix some signed/unsigned comparison warnings from GCC 3.3. 2002-08-25 21:18:15 +00:00
christos 1261c89715 From OpenBSD, via FreeBSD: If a set{u,g}id binary is invoked with fd < 3
closed, open those fds to /dev/null.

XXX: This needs to be fixed in a better way. The kernel should not need to
know about /dev/null or special case 0, 1, 2.
2002-04-23 15:11:25 +00:00
jdolecek 2e327b16be expose emul_search() 2002-04-02 20:18:06 +00:00
christos 83990b1879 Clear the P_INEXEC flag in other labels. Pointed out by he@netbsd.org 2002-01-12 14:20:30 +00:00
christos d4e7e4c9c4 Fix a ptrace/execve race that could be used to modify the child process's
image during execve. This is a security issue because one can
do that to setuid programs... From FreeBSD.
2002-01-11 21:16:27 +00:00
thorpej 205c159f0e Make the coredump routine exec-format/emulation specific. Split
out traditional NetBSD coredump routines into core_netbsd.c and
netbsd32_core.c (for COMPAT_NETBSD32).
2001-12-08 00:35:25 +00:00
jdolecek bf7f67be85 if the LKM support is not compiled in, don't bother using exec_lock
at all, it's only needed in LKM case

use #if defined(LKM) || defined(_LKM) condition for netbsd32_execve.c,
to DTRT when either compiled statically into kernel with LKM support,
or compiled as a LKM
2001-11-23 22:02:39 +00:00
lukem adc783d537 add RCSIDs 2001-11-12 15:25:01 +00:00
jdolecek ef8abe0767 Make the setregs hook emulation-specific, rather than executable
format specific.
Struct emul has a e_setregs hook back, which points to emulation-specific
setregs function. es_setregs of struct execsw now only points to
optional executable-specific setup function (this is only used for
ECOFF).
2001-09-18 19:36:32 +00:00
christos e2b51c04af - make copyargs function return the reason it failed and pass a pointer to
the stack, so that it can be modified.
- pass the error code in the exit code in addition to aborting.
- kill the second exit1() call; it does not make any sense.
2001-07-29 21:22:42 +00:00
christos 87e055d89e Use DPRINTF, and print all exec_vmcmds when we are debugging.
Don't use DEBUG, use DEBUG_EXEC to turn all that on.
2001-07-15 20:49:40 +00:00
christos 0f380fac15 Add an e_trapsignal member to struct emul, so that emulated processes can
send the appropriate signal depending on the trap type.
2001-06-18 02:00:48 +00:00
thorpej 7660fd850d In check_exec(), don't bother checking P_TRACED along with
MNT_NOSUID, just check MNT_NOSUID to clear the S{U,G}ID bits
in the attributes for the vnode we're about to exec.

We now check P_TRACED right before we would actually perform
the s{u,g}id function in the exec code.

This closes a race condition between exec of a setuid binary
and ptrace(2).
2001-06-15 17:24:19 +00:00
manu 7e6929fe90 Changed EMUL_BSD_ASYNCIO_PIPE to EMUL_NO_BSD_ASYNCIO_PIPE, so that
the native emulation (NetBSD) does not have a flag.
2001-05-07 09:55:12 +00:00
manu 5a6b8191b5 Added two flags to emulation packages:
EMUL_BSD_ASYNCIO_PIPE notes that the emulated binaries expect the original
BSD pipe behavior for asynchronous I/O, which is to fire SIGIO on read() and
write(). OSes without this flag do not expect any SIGIO to be fired on
read() and write() for pipes, even when async I/O was requested. As far as
we know, the OSes that need EMUL_BSD_ASYNCIO_PIPE are NetBSD, OSF/1 and
Darwin.

EMUL_NO_SIGIO_ON_READ notes that the emulated binaries that requested
asynchrnous I/O expect the reader process to be notified by a SIGIO, but
not the writer process. OSes without this flag expect the reader and the
writer to be notified when some data has arrived or when some data have been
read. As far as we know, the OSes that need EMUL_NO_SIGIO_ON_READ are Linux
and SunOS.
2001-05-06 19:09:52 +00:00
lukem 735e1dcaa8 convert to ANSI KNF 2001-02-26 20:43:25 +00:00
eeh 6a9224a06d Remove old compatibility hack. Should no longer be needed. 2001-02-21 00:47:21 +00:00
eeh 8a4a682091 Support flexible process address space limits and bump kernel version number. 2001-02-14 18:21:42 +00:00
eeh 4380259bc7 Specify a process' address space limits for uvmspace_exec(). 2001-02-06 17:01:51 +00:00
jdolecek e9e91a0fb5 split off thread specific stuff from struct sigacts to struct sigctx, leaving
only signal handler array sharable between threads
move other random signal stuff from struct proc to struct sigctx

This addresses kern/10981 by Matthew Orgass.
2000-12-22 22:58:52 +00:00
mycroft f495cd9dc6 Introduce 2 new flags in types.h:
* __HAVE_SYSCALL_INTERN.  If this is defined, e_syscall is replaced by
  e_syscall_intern, which is called at key places in the kernel.  This can be
  used to set a MD syscall handler pointer.  This obsoletes and replaces the
  *_HAS_SEPARATED_SYSCALL flags.
* __HAVE_MINIMAL_EMUL.  If this is defined, certain (deprecated) elements in
  struct emul are omitted.
2000-12-11 05:28:59 +00:00
jdolecek 7a2157f1f3 emul_unregister(): fix incorrect loop condition - execsw[] is not NULL
terminated
2000-12-10 12:42:30 +00:00
jdolecek a6ca890142 always fill in e_syscall in respective emul_*; if the emulation doesn't
have it's own separated *_syscall() function, use syscall()
2000-12-09 12:38:23 +00:00
jdolecek 0576f87ad3 add infrastructure to load emulations and their executable support dynamically
via LKM
2000-12-08 19:42:11 +00:00
jdolecek 6ae23b9300 update comment about the sense of placement of NDINIT() 2000-12-07 16:14:35 +00:00
jdolecek d06ce6de86 set the EMUL_HAS_SYS___syscall flag for emul_netbsd 2000-12-01 19:41:49 +00:00
jdolecek 01040d97a2 add e_path (emulation path) to struct emul, which replaces emulation-specific
*_emul_path variables

change macros CHECK_ALT_{CREAT|EXIST} to use that, 'root' doesn't need
to be passed explicitly any more and *_CHECK_ALT_{CREAT|EXIST} are removed
change explicit emul_find() calls in probe functions to get the emulation
path from the checked exec switch entry's emulation

remove no longer needed header files

add e_flags and e_syscall to struct emul; these are unsed and empty for now
2000-12-01 12:28:30 +00:00
mrg b4e53bf009 wrap newly introduced >80 char lines. 2000-11-28 12:24:34 +00:00
chs aeda8d3b77 Initial integration of the Unified Buffer Cache project. 2000-11-27 08:39:39 +00:00
jdolecek baae0324b9 restructure struct emul and execsw, in preparation to make emulations LKMable:
* move all exec-type specific information from struct emul to execsw[] and
  provide single struct emul per emulation
* elf:
  - kern/exec_elf32.c:probe_funcs[] is gone, execsw[] how has one entry
    per emulation and contains pointer to respective probe function
  - interp is allocated via MALLOC() rather than on stack
  - elf_args structure is allocated via MALLOC() rather than malloc()
* ecoff: the per-emulation hooks moved from alpha and mips specific code
  to OSF1 and Ultrix compat code as appropriate, execsw[] has one entry per
  emulation supporting ecoff with appropriate probe function
* the makecmds/probe functions don't set emulation, pointer to emulation is
  part of appropriate execsw[] entry
* constify couple of structures
2000-11-21 00:37:49 +00:00
jdolecek 4ba9d75b97 pass pointer to used exec_package to emulation-specific exec hook -
emulation code may make decisions based on e.g. exec format
2000-11-16 20:04:33 +00:00
jdolecek 7d8eefdffc add void *p_emuldata into struct proc - this can be used to hold per-process
emulation-specific data
add process exit, exec and fork function hooks into struct emul:
* e_proc_fork() - called in fork1() after the new forked process is setup
* e_proc_exec() - called in sys_execve() after the executed process is setup
* e_proc_exit() - called in exit1() after all the other process cleanups are
  done, right before machine-dependant switch to new context; also called
  for "old" emulation from sys_execve() if emulation of executed program and
  the original process is different

This was discussed on tech-kern.
2000-11-07 12:41:52 +00:00
eeh 1ecf6779be Add support for variable end of user stacks needed to support COMPAT_NETBSD32:
`struct vmspace' has a new field `vm_minsaddr' which is the user TOS.

	PS_STRINGS is deprecated in favor of curproc->p_pstr which is derived
	from `vm_minsaddr'.

	Bump the kernel version number.
2000-09-28 19:05:06 +00:00
thorpej 7cc27a88c0 Convert namei pathname buffer allocation to use the pool allocator. 2000-08-03 20:41:05 +00:00
thorpej 0b3ef940d0 MALLOC()/FREE() should not be used for variable sized allocations.
(A few remain here -- need to fix exec_script.c)
2000-08-02 20:36:33 +00:00
thorpej cd32ace8bb ANSI'ify. 2000-08-01 04:57:28 +00:00
mycroft 9daa55017e Fix the sparc_v9 hack... 2000-07-27 13:45:59 +00:00
mycroft 93a8d5ffea The ELF ABI declares that argc must fill an `argument slot'. Make it so.
For __sparc_v9__ only, do a hack to make old executables continue to work --
for now.
2000-07-26 15:42:09 +00:00
matt 84bbae583c remove a debugging printf. 2000-07-13 02:33:36 +00:00
matt 81ce10aa1f Extend the vmcmd stuff a bit. Add a flags field and define
VMCMD_BASE & VMCMD_RELATIVE.  This allows one to add vmcmds
which are relative to previous entries.  This is needed for
loading the VAX ld.elf_so
2000-07-13 01:24:04 +00:00
mrg 32aa199ccf remove include of <vm/vm.h> 2000-06-27 17:41:07 +00:00
mrg 2f159a1bac remove/move more mach vm header files:
<vm/pglist.h> -> <uvm/uvm_pglist.h>
	<vm/vm_inherit.h> -> <uvm/uvm_inherit.h>
	<vm/vm_kern.h> -> into <uvm/uvm_extern.h>
	<vm/vm_object.h> -> nothing
	<vm/vm_pager.h> -> into <uvm/uvm_pager.h>

also includes a bunch of <vm/vm_page.h> include removals (due to redudancy
with <vm/vm.h>), and a scattering of other similar headers.
2000-06-26 14:20:25 +00:00
matt f2bfc30377 Add some kernel printfs (under DEBUG) to print messages when bad things
happen in a exec.
2000-06-21 05:43:33 +00:00
sommerfeld 40339b39f9 Reduce use of curproc in several places:
- Change ktrace interface to pass in the current process, rather than
p->p_tracep, since the various ktr* function need curproc anyway.

 - Add curproc as a parameter to mi_switch() since all callers had it
handy anyway.

 - Add a second proc argument for inferior() since callers all had
curproc handy.

Also, miscellaneous cleanups in ktrace:

 - ktrace now always uses file-based, rather than vnode-based I/O
(simplifies, increases type safety); eliminate KTRFLAG_FD & KTRFAC_FD.
Do non-blocking I/O, and yield a finite number of times when receiving
EWOULDBLOCK before giving up.

 - move code duplicated between sys_fktrace and sys_ktrace into ktrace_common.

 - simplify interface to ktrwrite()
2000-05-27 00:40:29 +00:00
simonb 40f8a88c3f Fill in locators for process argv/envp data after ps_strings is built. 2000-05-26 02:24:37 +00:00
augustss 264f1d27c6 Get rid of register declarations. 2000-03-30 09:27:11 +00:00
fvdl 65e677bd99 Add an exec hook mechanism, where kernel subsystem can register to
execute certain functions when a process does an exec(). Currently
uses a global list. Could possibly be done using a per-process list,
but this needs more thought.
2000-01-25 01:15:14 +00:00
mrg e7552e93d7 reverse (and fix) the logic of the other change; it cause semi-random alpha SIGABRT for longer command lines 2000-01-05 08:11:31 +00:00
eeh b142754870 Handle args for 32-bit emulation processes properly. 1999-12-30 15:59:26 +00:00
is 58f7417063 Call the machine dependent code to do d-cache/i-cache synchronization, for
architectures that need it. Without this, at least on Motorola 68040 and 68060
machines, the sigtramp regression test fails.
1999-11-21 17:04:05 +00:00